How to tell if two lines are perpendicular

ANSWER

The two lines are perpendicular if

EXPLANATION

Given two lines:

and

We can tell wether these two lines are perpendicular to each other using their slopes.

If the product of their slopes is -1, the then the two line are perpendicular.

For example:

The line

has slope

and the line

has slope

The product of the two slopes is

This implies that:

Therefore the two lines are perpendicular.

after going and makeing graphs i would go with a,

there is nothing that is matches the graph. if there was i would show you. but therefore my answer is a.

hope i

-lavira: )

step-by-step explanation: